Using ProdCal.Hour[] in BAQ - 8.03.405

Is there a way to use ProdCal.Hour in a calculated field in a BAQ? ProdCal.Hour001 gives a syntax error. ProdCal.Hour[1] passes the syntax text, but gives an error when testing:

Error Detail
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4GL STOP condition: The Server application has returned an error. (7243) (7241)


Stack Trace
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at Epicor.Mfg.UI.App.BusinessActivityQuery.BAQTransaction.Execute()
at Epicor.Mfg.UI.App.BusinessActivityQuery.BAQ.btnTest_Click(Object sender, EventArgs e)